Before: call ale#assert#SetUpLinterTest('verilog', 'verilator') After: call ale#assert#TearDownLinterTest() Execute(The default verilator command should be correct): AssertLinter 'verilator', 'verilator --lint-only -Wall -Wno-DECLFILENAME -I%s:h %t' Execute(verilator options should be configurable): " Additional args for the linter let g:ale_verilog_verilator_options = '-sv --default-language "1800-2012"' AssertLinter 'verilator', 'verilator --lint-only -Wall -Wno-DECLFILENAME -I%s:h -sv --default-language "1800-2012" %t'